ACT police say the main routes in and out of Canberra will be clogged by protesters in trucks, vans and cars on Monday.

The protesters arrive in Canberra on Sunday before starting a formal convoy from 5:30am Monday to protest against Federal Government policies like the proposed carbon tax.

The 'Convoy of No Confidence' is expected to clog Canberra's main streets including Northbourne Avenue, Adelaide Avenue, the Tuggeranong Parkway, Gungahlin Drive, and the Monaro and Barton highways.

Superintendent Michael Chew says police are working with the protest organisers to try to avoid traffic gridlock.

"At this stage there's no expectation there'll be any violent demonstration associated with the convoy," he said.

"They want to make their point with the members of Parliament and the organisers have been working with us over the last couple of weeks to ensure everything runs smoothly.

"They've been cooperating with us over the last couple of weeks and have stated they will continue to do so throughout Monday and Tuesday."

But Superintendent Chew warns there will be traffic disruptions.

"There will be traffic delays and traffic diversions in place to allow the Canberra public and the convoy participants to have access to Parliament and try and lessen the disruption to Canberra motorists on Monday morning," he said.

"The volume of traffic that they are potentially bringing into Canberra as part of the convoy will naturally cause bottlenecks and disruptions."

Superintendent Chew is urging commuters to be patient and consider taking alternate routes to work.

"We just ask everyone to be patient, and flexible, and if they can take other modes of transport to work on Monday morning or arrive later on Monday to work, then that would assist us in the movement of traffic around Canberra," he said.

He says the disruptions could flow into Tuesday.

"At this stage they plan to have the protest at Parliament House on Monday and possibly again on Tuesday.

"So we'd anticipate them hanging around Canberra for the two days. We're not sure how many people will hang around for the second day. But we're anticipating there could be traffic delays on Tuesday."